It is easily done. :)
There's something about Lilligant's adorable elegance that I love. Roserade and Breloom get a lot of use too. :)
I could try horde hunting for a Shiny Yellow Swablu and evolve it. Shiny Altaria would be a great contest Pokémon even if I already have 4. (Gardevoir, Lilligant, Whimsicott and Cosplay Pikachu)
Dark could be the last Gym where you can battle him in a mine shaft. The Elite Four would include a Fairy Type Member. Let's see Electric, Flying, Rock, Steel, Water, Ghost, Dragon and Dark seems a solid Gym lineup. With Fire, Grass, Fighting and Fairy Elite Four.